Secondary battery.



v UNITED STATES PATENT OFFICE.

-ROBERT H. IfIASSLER, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO NATIONAL BATTERY COMPANY, OF JERSEY CITY, NEW JERSEY, AND CLEVELAND, OHIO, A CORPORATION OF NEW JERSEY.

SECON DARY BATTERY.

SPECIFICATION forming part of Letters Patent N o. 696,171, dated March 25, 1902. Application tiled December 10,1900. Serial No. 391318. (No model.)

To all whom, it may concern.- with the active material the ribs and grooves Be it known that I, ROBERT H. HASSLER, a are substantially rectangular. citizen of the United States, residing in the The finely-corrugated.sheetof metal above city of Indianapolis, in the State of Indiana, described is next subjected to the action of 5 have invented certain new and useful Imother mechanism,'preferably in the nature of 55 provements in Secondary Batteries, of which a punch-press, whereby the smaller ribs b or the following is a specification, reference beprimary corrugation's are struck up or upset ing had to the accompanying drawings, formin groups d to form larger or secondary coring a part hereof. rugations. Each group is entirely separated ro This invention relates particularly to the along its edge from the next group, so that a 6o plates or grids to which is applied the active space or opening e is formed between adjamaterial, and has for its object to reduce cent groups, one edge of each group being weight, increase the capacity, prolong the efstruck toward one side of the plate and the fective life, and decrease the cost of producother edge of thesame group being struck to- 15 tion of secondary-battery plates. In accordward the other` side of `the plate, as clearly 65 ance with the invention the plate of metal, shown in detail in Fig. 6. lead, or grid previous to the application of It will be understood that in practice the the active material thereto is given such a ribs, both primary and secondary, are relashape or configuration as to afford a large tivelyshort, not extending entirely across the zo surface of contact for the active material and plate, but being arranged in series which are 7o to retain the same securely in position when separated by bands f. applied, While at the same time the necessary When the grid has been prepared in the mechanical strength is retained. manner above described, the active material The invention will be more fully described represented at g in Fig. 7 is pressed into the z5 hereinafter with reference to theaccompanygrid and baked or otherwise treated in the 75 ing drawings, in whic'nusual manner. By reason of the peculiar Figure 1 is a side View of a plate or sheet of formation of the grid, particularly the sepametal after subjection to the iirst step in the ration along their edges of the several groups formation of the improved grid. Fig. 2 is a of smaller ribs or corrugations, the active 3o section on the plane indicated by the broken material is securely keyed or dovetailed in 8o line 2 2 of Fig. 1. Fig. 3 is a section on the the grid. The fact that the units of active plane indicated by the line33of Fig. 2. Fig. material on opposite sides of the plate are 4 is a view of the completed grid. Fig. 5 is a united to each other through the openings section on the plane indicated on the line 5 5 between the groups insures the retention of 35 of Fig. 4E. Fig. 6 is a section on the plane inthese units firmly in position. At the same 85 dicated by the line 6 6 of Fig. 4. Fig. 7 is a time the joining of the smaller ribs alongtheir view similar to Fig. 6, but showing the active edges preserves the mechanicalstrength of material applied to the grid. the plate, so that the application of the paste The plate or sheet a of metal is first subor active material is accomplished much more 4o jected to the action of rollers or any other easily and the iinished product is much less 9o suitable mechanism whereby small alternatsusceptible to the disintegrating influence of ing ribs b and grooves c are formed, the ribs the Plante action when the battery is in use. and grooves being staggered on opposite sides I claim as my inventionof the plate. In this operation the ribs on 1. A grid for secondary batteries having a 45 opposite sides are preferably not separated series of groups of primary ribs and grooves 95 along their edges, but remain connected, as or corrugations, the edges of each group beclearly shown in Fig. 3, the plate thus being ing struck in oppositedirections whereby each in effectnelycorrugated, although byreason group is separated from the next along its of the nature of the metal and as a matter of edge, substantially as shown and described. 5o preference in order to secure a better union 2. A plate for secondary batteries comprisroo ing a grid and active material, the grid havopenings between adjacent; groups, substaniug a series of groups of primary ribs and tially as shown and described. io grooves or eorrugations, the edges of each Thisspeciicationsignedandwitnessedthis group being struck in opposite directions, 27th day of November, A. D. 1900.

whereby adjacent groups are separated along ROBERT H. HASSLER. their edges forming openings, and the units In presence ofof active material on opposite sides of the CHAS. L. PEPPER, plate being united to eaeh other through the MARK C. OCoNNoR. 

